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2005
Pyridine derivatives
R 0380
Ring Opening Reactions of 1,2-Didehydroprolines. Part 2. Synthesis of 5-AminoAcids, Their 2-Piperidones and Pentanolides. — The
36- 129 -2,4-dihydroxypentanoic
product distribution of reduction of (I) strongly depends on the pH value. The optimization of the reaction conditions allows the preparation of target compounds (IX) and
its diastereomer (not shown in the scheme). In order to separate the diastereomers of
(II) and unambiguously assign their configurations piperidones (VI) and (VII) are synthesized and separated. — (HAEUSLER*, J.; KAEHLIG, H.; Monatsh. Chem. 136
(2005) 5, 719-726; Inst. Org. Chem., Univ. Wien, A-1090 Wien, Austria; Eng.) —
M. Paetzel
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